Reversible chuck.



No. 799,006. PATBNTED SEPT. 5, 1905. D. E. KEMPSTER.

REVERSIBLE CHUCK. APPLICATION FILED r212. 16, 1903. RENEWED r213.6.1905.

DANIEL E. KEMPSTER, OF BOSTON, MASSACHUSETTS.

REVERSIBLE CHUCK- Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed February 16, 1903. Renewed February 6, 1905. SerialNo. 244,356.

To rtZl whom, it Duty concern- Beit known that l, DANIEL E. Knnrsrnn, ofBoston, in the county of Suffolk and State of Massachusetts, haveinvented certain new and useful Improvements in Reversible Chucks, ofwhich the following is a specification.

This invention relates to improvements in reversible chucks in which thearticle may be clamped or held and may be turned end for end, so thatwork may be performed on opposite ends of the article without removingit from the chuck and the surfaces on opposite ends of the articleworked upon will be concentric and true.

The invention has for its objects to provide novel, convenient, andsimple means whereby the article may be turned very quickly and will beas near as possible to the head-stock of the lathe or other machine onwhich the improved chuck is to be used while the work is beingperformed.

The invention consists of the novel construction, arrangement, andcombination of parts, as will be fully described hereinafter, and it iscarried out substantially as illustrated on the accompanying drawings,which form an essential part of this specification, and whereon likecharacters of reference refer to like parts wherever they occur.

On the drawings, Figure 1 represents a side elevation of one arrangementof my improved chuck, showing in construction-lines the position of thechuck while it is being reversed. Fig. 2 represents a front elevation ofthe chuck shown in Fig. 1. F'g. 3 represents a side elevation of anotherarrangement of the improved chuck, also showing in construction linesthe position of the parts while the chuck is being reversed. Fig. 1represents a front elevation of the chuck shown in Fig. 3. Fig. 5represents a detail view of one form of joint which may be used to allowthe chuck to be reversed.

The chuck proper which is to be used with my improved reversingmechanism may be of any of the common and well-known forms of open orring chucks, and therefore I shall not enter into a minute descriptionof its construction, but will simply say that it consists of a bodyportion 1 having radiating jaws 9. mounted upon the body portion in sucha manner that they are movable radially toward and from the center ofthe chuck by any of the common and well-known means now in use for thatpurpose, but which are preferably of the universal construction wherebythe jaws all are moved in unison, and therefore keep at a uniformdistance from the center of the chuck.

A face-plate 3, having means, as the removable flanged collar 4. on theback thereof to attach said face-plate to the spindle of the lathe orother machine on which the chuck is to be used, is preferably providedin its face with a chamber 5 (shown by dotted lines in Figs. 1 and 3)and for a purpose to be understood by the completed description of thedevice. The chuck-body l is adjustably secured to the face-plate 3 bymeans of a chuckholding device, which may be in the form of a block 6,pivoted at 7 to a bracket 8, secured to the face-plate and forming abearing for the trunnion 9 on the chuck-body, which is rotatably mountedon the block 6, as shown in Figs. 1 and 9., or said chuck-body may beadjustably secured to the face-plate by means of a ring-shaped block 10,pivotally attached at 11 to an ear 12, made in one piece with or securedto the face-plate and having the trunnions 13 13 on opposite sides ofthe chuckbody rotatably mounted in bearings on the ring-shaped block 10,as shown in Figs. 3 and a. By these connections between the faceplate 3and the body portion 1 of the chuck it will be seen that the chuck-bodymay be swung outward away from the face-plate. by turning the block 6upon its journals 7, as shown in Fig. 1, or the block 10 upon itsjournal 11, as shown in Fig. 3, and when said chuck-body is swungoutward sufficiently said body may be turned upon its trunnion 9, asshown in Fig 1, or upon its trunnions 13 13, as shown in Fig. 3, so asto reverse the exposed surface of the chuck-body, thereby turning anyarticle end .for end which may be held by the clamping-jaws of thechuck.

I The chuck-body 1, as shown in Figs. 1 and 2, or the ring-shaped block10, as shown in Figs. 3 and 4, are provided with a forked projection 14,which in connecting with a screwthreadod rod 15, pivoted at 16 to thefaceplate, and a thumb-nut 17 on said rod, tends to clamp and hold theinner surface of the chuck-body 1 in contact with the surface of theface-plate. The surface of the face-plate against which the chuck-bodyis hold is preferably provided with a recess 18, (shown by dotted linesin Figs. 1 and 3,) which recess is of proper size and shape to lit thechuckbody. By this means the chuck-body is always brought to a properposition when clamped to the face-plate by the screw-rod 15 and nut 17,the recess 18 acting to assist in preventing the movement of the chuckupon the faceplate.

In order to limit the forward movement of the chuck-body when turnedupon the journal 7 of the block 6 or upon the journal 11 of the block10, I provide said blocks with the respective surfaces 19 and 20, whichengage, respectively, the surface of the bracket 8 and the face-plate 3,and which therefore form stops to limit the outward movement of thechuck.

In Fig. 5 I have shown a form of the connecting device between thechuck-body 1 and the face-plate 3 which is the preferred manner offorming said connection, as it is very simple and inexpensive to make,while at the same time it accomplishes all that is accomplished by theother constructions shown.

In the construction shown in Fig. 5 I use a stud 21, which is adjustablelongitudinally within a perforation in the face-plate 3 by means of thenuts 22 and 23, adjustable upon screw-threads upon the extension of saidstud, so as to clamp the face-plate on opposite sides thereof. This stud21 is prevented from turning within the face plate by the screw 24:,which enters a keyway on the stud. To the other end of the stud 21 at 25is pivotally attached the block 26, the free end of which forms a pin 27which enters a recess in the chuck-body 1 and upon which the chuck-bodymay swivel when the block 26 is turned outward upon its pivotalconnection to the stud 21. A screw 28, in connection with a groove uponthe pin 27, prevents the chuck-body from being accidentally withdrawnfrom the pin. The block 26 is provided with a surface 29 (shownin dottedlines on the drawings) and by which the outward movement of the blockand the chuck-body carried thereby are limited. The operation of thisconstruction of the connection between the chuck-body and the faceplateis the same as that of the construction shown in Figs. 1 and 2, thechuck-body swinging outward from the face-plate upon the pivotalconnection of the block 26 to the stud 21 at 25 and the chuck-bodyrotating upon the pin 27 in order to reverse the exposed face of thechuck-body.

From the foregoing descriptions of the connections between thechuck-body and the faceplate it will be seen that there is a combinedhinge and swivel joint formed, whereby the chuck-body may be first swungoutward from the face-plate, then turned to swivel bodily upon itself,and finally swung back into position against the face-plate, with eitherof its sides exposed, as desired. This reversing of the exposed faces ofthe chuck-body is very easily and quickly done and while held by thechuck may be operated upon at opposite ends Without removing them fromthe chuck, and thus forming surfaces which will be perfectly concentricand true.

My improved chuck is very easy of operation and is held very firmly inplace when work is being done upon the articles held thereby, as theholding-jaws are very near the headstock of the lathe or other machineon which the chuck is used and there is consequently less liability forthe chuck or article to vibrate.

Having thus fully described the nature, construction, and operation ofmy invention, I wish to secure by Letters Patent and claim 1. In areversible chuck, a chuck-body with radiating jaws thereon to hold thework, a faceplate having means to attach it to the spindle of the latheor other machine on which it is to be used, a block journaled to theface-plate near one edge of said plate, and having the chuck journaledto said block, and means to clamp the chuck against the face of thefaceplate, whereby the chuck-body may be swung bodily outward from theface-plate and reversed.

2. In a reversible chuck, a chuck-body having radiating jaws thereon tohold the work, aface-plate recessed to receive the chuck-body and havingmeans to attach it to the spindle of the machine on which it is used, ablock journaled to said faceplate near one edge of said plate, andhaving the chuck-body pivotally attached to said block, and means toclamp the chuck-body against the face of the faceplate within saidrecess, whereby the chuckbody may be swung bodily outward from theface-plate and reversed.

3. In a reversible chuck, a chuck-body having radiating jaws thereon tohold the work, a face-plate having means to attach it to the spindle ofthe machine on which it is used, a block journaled to said face-platenear one edge of said plate and having the chuck-body pivotally attachedto said block, a screwthreaded rod, a nut on said rod, and a forkedprojection to receive said rod, whereby the chuck-body may be clampedfirmlyagainst the face-plate, whereby the chuck-body may be swung bodilyoutward from the face-plate and reversed.

4. In a reversible chuck, a chuck-body having jaws to clamp and hold thework, .a faceplate having means to attach it to the machine on which itis to be used, a block journaled to the face-plate near one edge of saidplate and having the chuck-body journaled to said block at right anglesto the journal of the block to the face-plate, and means to clamp andhold the chuck-body against the face-plate, whereby the chuck-body maybe swung bodily outward from the face-plate and reversed.

5. In a reversible chuck, aface-plate having means to attach it to alathe or other machine on which it is to be used, an open or ringshapedchuck -body having clampingjaws thereon, a block hinged to theface-plate near one edge of said plate carrying said chuckbody rotatablymounted thereon, and means to clam p the eh Lick-bod y against theface-plate. whereby the chuck-body maybe swung bodily outward from theface-plate and reversed.

6. ln a reversible chuck, a face-plate having means to attach it to alathe or other machine on which it is to be used, a chuck-body havingmeans to hold the work to be operated upon connected to the face-plateby a joint permitting the chuck-body to be swung away from theface-plate and rotated to present opposite faces thereof and means toclamp the chuckbody against the face-plate.

T. in a reversible chuck, a face-plate having means to attach it to alathe or other machine

